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4 years ago

List and briefly defined categories of security services.

1 answer:

7 0

There are six categories of security services: authenticiation, access control, data confidentiality, data integrity, nonrepudiation, and availability service. First, is authentication service, which defines as the assurance that the communicator is legitimate and is the one that it claims to be. It can either be peer entity or data origin authentication. Second, access control which is to prevent any unauthorized uses of resources. After one is being authenticiated, then this service limit/controls who access? what accessing rights to the resources are allowed depending on the identified individuals. Data confifentiality: the protection of data from unauthorized disclosure. Data integrity: the assurance that data received are exactly as sent by an authorized entity (e.t.c, contain no modificafion, insertion, deletion, or replay).

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What would be the most popular piece of technology on Earth?

spin [16.1K]

Answer:

the smart phone

Explanation:

It is the most widley used and accepted

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3 years ago

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Define a function group-by-nondecreasing, which takes in a stream of numbers and outputs a stream of lists, which overall has th

Debora [2.8K]

Answer:

def group_by_nondecreasing( *args ) :

num_list = [arg for arg in args]

sorted_numlist = sorted( num_list )

list_stream = [ sorted_numlist, sorted_numlist, sorted_numlist ]

return list_stream

Explanation:

This python function has the ability to accept multiple and varying amount of arguments. the list comprehension shorten the logical for statement to generate a list of numbers, sorts the list in ascending order by default and duplicates the list in another list.

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3 years ago

The function below takes a single string parameter: sentence. Complete the function to return everything but the middle 10 chara

dolphi86 [110]

Answer:

def get_middle_ten(sentence):

ind = (len(sentence) - 12) // 2

return sentence[ind:ind + 12]

# Testing the function here. ignore/remove the code below if not required

print(get_middle_twelve("abcdefghijkl"))

print(get_middle_twelve("abcdefghijklmnopqr"))

print(get_middle_twelve("abcdefghijklmnopqrst"))

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3 years ago

Protocols used in each layers in each osi reference model

natka813 [3]

The protocols that are often used in each layers in each OSI reference model are:

Layers Protocols

Layer 7- Application SMTP, HTTP, FTP, POP3, SNMP

Layer 6- Presentation MPEG, ASCH, SSL, TLS

Layer 5-Session NetBIOS, SAP

Layer 4-Transport TCP, UDP

Layer 3-Network IPV5, IPV6, ICMP, IPSEC, ARP, MPLS.

Layer 2-Data Link RAPA, PPP, Frame Relay, ATM, Fiber Cable.

Layer 1-Physical RS232, 100BaseTX, ISDN, 11.

<h3>What is OSI Model?</h3>

The OSI Model is known to be a kind of a logical and conceptual framework that tells all about network communication that is often used by systems in an open to interconnection and also in any communication with other forms of systems.

Note that the Open System Interconnection (OSI Model) is one that tells more about a logical network and it is one that also tells about computer packet transfer via the use of various layers of protocols.

Therefore, The protocols that are often used in each layers in each OSI reference model are:

Layers Protocols

Layer 7- Application SMTP, HTTP, FTP, POP3, SNMP

Layer 6- Presentation MPEG, ASCH, SSL, TLS

Layer 5-Session NetBIOS, SAP

Layer 4-Transport TCP, UDP

Layer 3-Network IPV5, IPV6, ICMP, IPSEC, ARP, MPLS.

Layer 2-Data Link RAPA, PPP, Frame Relay, ATM, Fiber Cable.

Layer 1-Physical RS232, 100BaseTX, ISDN, 11.

Learn more about OSI reference model from

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#SPJ1

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2 years ago

Name two primary goals of quality assurance and control programs:

bulgar [2K]

Answer:

The two main goals are to reach CMM level 5, and when the company can be termed as optimized.

The second goal is to minimize the bugs at the current level as well. And this is important, as improvement is one thing, and ensuring you are correct at the current time is another, and which is essential for survival. And you can think of improvement only if you survive.

Explanation:

The dream of all companies is to become Optimized. And they always try to reach CMM level 5, such that they can serve their clients in the best possible manner. And it is the quality assurance team that keeps an eye on the working of the company and keeps on giving their feedback so that the team can provide better service to the clients in the future, and probably reach the CMMI level 5.

The control program makes the operating system better through the development of an environment in which one can run various other programs. And it, in general, formulates the graphical interface and leverage you to run various programs at one time in various windows. And the control programs are also being known as the operating environment.

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3 years ago